In cavity wall insulation a layer of insulation is injected between the inner and outer walls. This form of insulation retains heat within the building and protects the structure against penetrating cold, draughts and damp from outside. It is also one of the most efficient ways of saving energy.
The useful lifespan of polyurethane cavity wall insulation significantly exceeds that of several other insulating materials. Polyurethane insulation does not collapse, shrink or crumble, so that it retains the same insulating properties throughout the entire lifespan of the building.